His name is Nagisa midoriya
Adopted as a baby by the midoriya family
He lives with his adopted brother and mum
His quirk is powerful but it scares people he also is able to hide his emotions scarily well when needed which makes surprise attacks a...
Nagisa: ugh how did it come to this in order to beat katsuki I need to go all out but I don't know how that'll go
Flashback
Nagisa is still a kid in this story and he is currently training it to be the best it can be
In a park next to a forest Nagisa and Kacchan are doing a simple spar no big moves just testing powers
Nagisa: hey Kacchan I figured out a new part of my power wanna see
Katsuki: yeah show me show me
Nagisa: well I found out I can use dinosaurs power to make me super strong
Katsuki: that's awesome show me
Nagisa finds a good sized Rock something that a normal 4-6 year old should not be able to even lift
And Nagisa picks it up with almost no effort and throws it up in the air
Katsuki: wow
Some parents and adults are watching the two kids improve while Izuku is off to the side he has recently been confirmed quirkless but they have not reached the point that they have given up hope
Katsuki: wow what else can you do
Nagisa: well I figured out I can fly alongside you
Suddenly two wings that look like a pterodactyls wings appears on Nagisa's back
Nagjsa starts flying and katsuki launches off and they are in the air together
Nagisa: wow is this what you see all the time
Katsuki: yeah it's amazing
The land together
Nagisa: time to do some more awesome stuff
Nagisa speeds forward and makes claws appear and slices a tree clean in half Nagisa: claws of a raptor my friend Katsuki: awesome heh don't think you'll get stronger than me Naga Nagisa: you might just have to watch out Kacchan
Suddenly Nagisa falls to the ground in pain and he starts writhing on the ground like he's having a seizure
Izuku and Inko run right over
Inko: Nagisa whats happening Izuku: wake up
Nagisa suddenly stops moving and slowly gets super while laughing
Nagisa?: I wondered when that little weakling would finally set me free
Katsuki, Inko and Izuku both back away while katsuki's parents stand up and ru over
Nagisa?: oh so your afraid of me I knew it haha that's good it's what makes it so much fun
Suddenly scales begin to grow all over his body
Until finally
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Nagisa?: there we go I think this form suits me much better what do you think
Katsuki: Na..Na..Naga what's going on quit joking around Izuku: yeah whatever this is it isn't funny
Nagisa?: Naga huh I like that name I think I'll steal it now time to wreak some havoc hahaha
Katsuki: that's not gonna happen
Katsuki uses his explosions to blast himself forward and tries to hit Naga in the face Naga catches katsuki's fist without any effort Naga: hehe your supposed to be stronger than this little weakling He throws katsuki away and he slides along the ground in pain Nagisa than starts walking towards katsuki Nagisa: it's time to die you stupid Pomeranian
Naga makes claws and goes to stab katsuki but Izuku jumps in between them
Naga stops: get out of the way Izuku: no your my brother and he's my best friend I won't let you do it so get out of him now
Naga: SHUT UP
Naga goes to finish Izuku but it stops a centimetre before Izuku's face
Because a certain man had caught his arm
It was hisashi
Hisashi: hey son didn't you say you'd be the greatest hero this isn't very heroic of you
Naga: out of the way old man
Hisashi: if you gonna try and kill your brothers not happening
Nagisa: he's right I don't know what you are but get the hell out of my body
Naga; I'll be gone for now but I will come back
Nagisa looks around and sees the horrified look of the public and sees katsuki getting up Nagisa: what did I do Nagisa suddenly just passes out
Inko runs over and hisashi picks him up: he needs to go to the hospital now
Mitsuki (katsuki's mum): right katsuki we are going home
Katsuki: no way I want to know if he's ok
Mitsuki: honey he will be so please let the family sort this out
Katsuki: NO, miss Inko,Izuku take me with you please
Inko nods: he'll be ok I promise let's get in the car
Hisashi: I'll drive let's go
The family and katsuki run off and katsuki's parents are close behind
About 3 hours later Nagisa wakes up in a bed with Izuku, katsuki and their parents standing over him
Nagisa: what happened why does my head hurt
Doctor: I think I can answer that it seems your quirk finally went out of control kid amd it seems to be very destructive you have a separate personality brought on when your quirk is overused
Nagisa: oh so that was me that was scaring everyone and I was the one who hurt Kacchan
Katsuki: no you didn't Naga it's fine I'm ok it's just a little scratch
Nagisa: you where still scared though weren't you
Katsuki: well...
Nagisa just looks at him: so i guess that means I can't be a hero, a hero doesn't scare people and hurt his friends
Doctor: now that's where your wrong kid, while if your quirk goes out of control it cam be dangerous we can take measures to make sure that doesn't happen for example try holding back don't go completely crazy with your power not until your ready for it
Nagisa: so I just have to train to make sure this doesn't happen again
Doctor: precisely but your quirk seems interesting for all we know that other side could pop up whenever so just be careful
Nagjsa begins to think: (maybe I shouldn't be a hero maybe my brother should've got a power I got he's much more worthy and way stronger than me he wouldn't scare and hurt his loved ones)
Nagisa: can I go home now
Doctor: yes your free to go your all healed and not even a bruise
Nagisa: thank you
Hisashi picks up Nagisa since he's till tired and takes him home katsuki reassures Nagisa that he is fine
Katuski: you'll be fine Na-gisa
Nagisa: thank you Kacchan
And that's a wrap
This chapter didn't change but it didn't need too but it just changed its position
